US914758A - Device for straining waste water. - Google Patents

Description

O- SUHUMANN.

' DEVICE FOR STRAINING WASTE WATER. APPLICATION FILED JULY 18', 1902.

914,758. Patented Mar. 9, 1909.

OTTo S CHUMAN N,

Atterneg.

[lire/1% orr'o SGHUMANN, or DRESDEN, GERMANY.

DEVICE FOR STRAINING WASTE WATER.

I Specification of Letters Patent.

Patented March 9,1909.

Application filed July 18, 1908. Serial No. 444,233.

To all whom it may concern.

Be it known that I, O'rro SGHUMANN, a citizen of the German Empire, and resident of Dresden A, Saxony, German Empire, have invented new and useful Improved Devices for Straining Waste Water, of which the following is a description.

The present invention relates to 'rotar filter sieves or screens for straining and purifying Waste Water and its object is to so arrange the screen or strainer that the greater part of its area shall be immersed in the water to be strained, thus rendering the sieve more effective and also tendingto sort the filterings according to their specific gravity. These objects areattained by making the sieve of a conical shape or substantiall conical and mounting it on an axis or she t inclined toward the oniiowing waste water, sewage or the like.

In order to render the present specification easily intelligible reference is had to the accompanying drawing in which similar letters of reference denote similar parts throughout the several views:

Figure 1 isa central vertical longitudinal section through the apparatus and Fig. 2 is a plan view of the same.

The waste water sewage or the like flows into the it c at the inflow a and passing through the screen d passes out of the pit at he screen cl is substantially conical in form and is modnted on the inclined shaft c in such manner that the highest section of its surface shall be in a plane just above the level of the water. As shown in the drawings the surface of the screen which is above the water is represented by the line y 1 but' it might be much smaller as indicated by the line 2 2 (Fig. 2). The screen is provided with a rim of teeth 9 by means of which it is 1'0- tated b suitable gearing and the pinion h. Along t resurface which extends out of the water suitable means are mounted for clearmg away'the 1m uritles strained out of the water.

In the (rawing a chain of buckets t is re resented, which may be moved radially a ong the conical screen and will trans-' port the impurities off the same on to the inclined surface 7c, which passes them on to the verticall moving bucket chain Z or any other suitab e device.

At the bottom'of the housing a scumbr mud pit a is laterally dis osed, into which the heavier impurities wil be forced by the rotation of the screen, and into which furthermore a vertical elevator or bucket chain m extends for raising the contents of the same. v

v The shape and disposition of the conical screen of t e present invention enables practically the whole of the sieve to be immersed,

while it has the additional advantage that the surface which meets the oncomin water is most sharply mchned. This resu ts in a sorting of the impurities strained off according to theirspeclfic gravity, the'very heavy parts being rotation of t ing disposed farther from or nearer to the pushed into the mud pithy the e screen and the other parts be center of. the latter according as to whether they are of a heavier or lighter nature, the heavier parts lying toward the edges or encumference of the screen.

In the drawings I have illustrated an em! bodiment of the invention, but this arrange ment could be varied in many ways without departing from the spirit of the invention. It will be readily understood that the surface of the screen extending out of the Water need not be necessarily absolutely parallelto the surface of the water.

I claim as my invention 1. In a device for straining waste water and the like, the combination of a suitable pit having waste water inletand strained water outlet, a conical screen, an inclined axis on which the said screen is mounted to rotate, the said screen having-its uppermost surface substantially parallel with the water level and extending out of the same.

2. In a 'device for straining waste water and the like, the combination of a suitable pit having Waste water inlet, and strained Water outlet, a conical screen an inclined axis on which the said screen is mounted to rotate, the said screen having its uppermost surface substantially parallel with the water level and extending out of the same, and meansi s J water outlet, acoincnl screen an inclined axis of the screen and means for removmg the.

on Whichthc, snid screen is mounted to rotate, the saicl screen having its uppcrniostsurface substantially parallel with the water level and extending out Of the same, means for removing impurities from the part of the screen extending out of ti 1e water, a scum pit formed at the lowest point of the screen pit,'leterally im urities therefrom, 10

' n testimony whereof aflix my signature in the presence of two Witnesses.

OTTO SCHUMANN. Witnesses:

RICHARD IFFERTE, PAUL LIENEMANN;

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